[Request] add statistics element in header of the SVG file

[KustoKing]

Is your feature request related to a problem?

I would live to see some ways to track coverage from the SVG

Describe the solution you'd like

I would live to see some counters in the SVG. Percentage of Techniques by Tactic, Percentage of Techniques by All

Describe alternatives you've considered

None yet, but that is more that I am not that experienced in Python yet.